Maf sensor testing the techassist team its always a good idea to test a mass airflow maf sensor before replacing it. This is necessary to determine how much fuel to inject, when to ignite the cylinder, and when to shift the transmission. Technical advances like the bosch wideband oxygen sensor have allowed vehicle manufacturers to increase fuel economy as well as engine performance. Jan 23, 2012 testing a mass air flow sensor for a volvo xc v70. Pressure confirmed i am not sure if the sensor delivers correct data and i am by nature a person interested in details so i wanted to compare it to a new sensor. Map and maf sensors have become an integral part of the engine management system. The air management system ensures that the correct air mass is supplied to the engine in every operating situation. Volkswagen air mass sensor, maf bosch 0280218017, 635 new oem vw maf. Hotfilm mass air flow sensor hfm8 bosch automotive technology. Plus or minus 5% deviation to oe specification can set a check engine light which magnifies the importance of the oe part. Bosch air mass sensors are built to exacting specifications as required for such a sensitive measuring device. Maf usually is placed after the air filter and before the throttle valve in the air flow sucked into the engine.
This requires sensors which precisely register the actual airmass flow and output a corresponding electrical signal to the open and closedloop control electronics. Some of the terms used for this component include air mass sensor air mass meter maf sensor hfm air flow sensor. Bosch sensortec is a fully owned subsidiary of robert bosch, dedicated to the world of consumer electronics. I want to measure the voltage output at certain temperature but do not get a signal. Never replace the sensor only unless recommended by the vehicle manufacturer bosch is the actual oe manufacture. The bosch sensortec development board is a versatile, universal demonstration and development environment for bosch sensortec sensor products. Pedro odessa, fl 8 years ago i had always wondered why there was such a big discrepancy in pricing between what the dealer charges and what you can find a genuine bosch with the same porsche part number on the internet. Air flow meter, mass air flow sensor and maf sensor. The sensor element could get contaminated or damaged. Bosch mass air flow sensor vw uses several bosch mafs for its tdis. Bosch reserves the right to make changes at any time to this manual or accompanying product without obligation to notify any person or organization of such changes.
For warranty information about this product, please click here pdf. Bosch micromachined sensorsystems in series production robert bosch corporation research and technology center 4009 miranda ave, ca94304 email. Bosch 0280217532 mass air flow sensor bosch mass airflow sensor. Air flow meter, mass air flow sensor and maf sensor suppliers. Here, the electronic control receives current and accurate information about the mass and other characteristics of the intake air. Made with oe technology for function, calibration and troublefree operation. Mass airflow measurement is an established technology.
Hfm8 mass airflow sensor with electric connector airmass flow 1 1 2 2 3 3. Printe in erany p oert osc h ll rits reserve also rearin any isposal eploitation reprouction. Mass air flow maf or air mass meter sensors are often overlooked when doing your routine maintenance schedule or a general service. Buy bosch 0280217515 original equipment mass air flow maf sensor. Bosch number 0 281 002 216, vw number 028 906 461 and also bosch number 0 280 217 121, vw number 06a 906 461. The development board can be used together with bosch sensortec development desktop software to configure all sensor parameters and readout display capture the data on the attached pc.
Fuel injector based on a signal received from the ecm, the fuel injector delivers the right amount of fuel to the combustion chamber. Bosch mass airflow sensors are engineered and tested to oe specifications and developed in conjunction with the vehicle manufacturers. I have tracked all sensors from vehicles cross reference tables. For reasons associated with flow, this sensor is far less sensitive to contamination than, for example, a hotwire airmass meter, and there is no need for the ecu to incorporate a selfcleaning burn. Air management hfm8 otfil ass airflow sensor robert osch mbh p tuttart erany. Bosch mass air flow maf sensors ensure low levels of harmful emissions with greater fuel efficiency and improved engine performance. Bosch hot film maf sensors are calibrated with the housing. The mass air flow sensor is probably the best way to measure the amount.
Oem bosch mass air flow sensor maf n20 n26 s55 s63 b38 b46 z4 the mass air flow sensor measures the amount of air flow to tell the computer how much fuel to add to the mixture. Common maf mass air flow manufacturers are bosch, delphi, denso, hitachi, pierburg and acdelco. New maf map sensor catalogue ignition specialist ngk spark plugs uk ltd has released a new catalogue which features full details of the range and applications of 87 maf sensors and 69 map sensors which were launched last september are featured in the 20182019 publication. Mass air flow maf sensors the mass air flow sensors converts the amount of air drawn into the engine into a voltage signal. Once in a while we may encounter a total failure of a maf sensor, one that is, perhaps, short circuited or internally open. Carscope viso lab scope has been used for all measurements below and all waveforms have been taken from properly working engines and sensors. If your mass air flow sensor needs replacement, it pays off to rely on a premium quality bosch mass air flow sensor. The drawn transfer curve drawn is from a bosch 0 280 218 018 maf. It consists of a heating element typically a temperature. Bosch maf sensor system datasheet electrical connector resistor. Most maf sensors used in automotive applications have an output signal range of 05 v, 05 ma or 010 khz. Bosch reserves the right to make changes at any time to this manual or accompanying. Is a ripper, but a bit dated and doesnt have all the package dimensions of some sensors im looking at. C70, s60, s70, s80, v70, v70 t5, v70 xc bosch automotive 281002757 original equipment mass air flow maf sensor.
Regardless of the type of maf, the sensors work similarly. Inputs sensors engine control systems i course 852 21 positionmode sensors and switches switch closed with the switch closed, voltage is present at the ecm. The sensors used in split second maf kits produce a nominal 05 v output signal. The maf sensor monitors the amount of air entering the engine and in my experience it. Their task is to send information to the vehicles engine control unit ecu, enabling it to control the airfuel mixture needed by the engine to operate efficiently. The mass air flow sensors and maf sensors which we supply are manufactured by bosch, denso, pierburg and siemens continental vdo. B hotfilm airmass meter, type hfm 2 w124 performance. The film resistors on the ceramic substrate are exposed to the air mass under measurement. Mass air flow sensor best maf sensor for cars, trucks. The heater resistor rh maintains the plati num metallicfilm resistor rs at a constant temperature above that of. Im absolutely sure about bosch f00c2g2044, f00c2g2030, f00c2g2033. Here is a fast and accurate way to track a mafs performance and output to the pcm. Cars can have either an analog or digital mass air flow sensor. The hotfilm airmass meter for the air control provides this information.
If the maf sensor malfunctions, there could be too much or too little fuel added to the mixture. Sensors are just what you need to lower your rides emission levels and increase fuel efficiency. This is necessary to determine how much fuel to inject, when to ignite the cylinder, and when to. Accelerometers for restraint and safety systems bosch produces accelerometers for deployment of, micromachining technology that has been developed at bosch. I have a bosch map sensor here 0281006108, it has 4 pins. Problems with mass air flow sensors are common in many cars, including bmw, gm, volkswagen, mazda, toyota, nissan and other brands. Much more common, however, are failure modes in which the maf sensor has become unreliable, underreporting or overreporting the true airflow into the engine. This requires sensors which precisely register the actual airmass flow and output a corresponding electrical signal. It guarantees optimum performance and long service.
Bosch maf sensor system datasheet free download as pdf file. Sensor and housing come in one unit for efficient and accurate engine performance. According to the type of the output signal maf sensors are. They have internal regulation that insures that the measurement is accurate as battery voltage changes.
Some of the terms used for this component include air mass sensor air mass meter maf sensor hfm air flow sensor air flow meter. Bosch oem mass air flow maf sensor for 200920 bmw 335d x5 l6 3. Bosch maf sensors can provide up to 20 percent better fuel consumption through accurate air flow measurement the bosch patented design increases robustness against water and is unharmed by dirt and contamination. Learn how to properly diagnose a mass air flow maf sensor failure, and get stepbystep guidance on replacing a bad maf sensor with a new maf sensor. Measuring output voltage by backprobing the plug wires. Types of sensors according to the principle of operation are. Optimal performance and low levels of harmful emissions. Bosch 0280217515 original equipment mass air flow maf sensor. Replacing a mass air flow sensor on your car youtube. Ive been scrounging through the bosch sites for hours but can only find fluff, nothing technical like that. Bosch 0280218010 original equipment mass air flow maf sensor. This plugin sensor is suitable for incorporating in the air filter or, using a.1185 517 1058 633 954 1476 1359 1160 917 558 1097 313 23 517 511 63 1391 372 546 1083 1135 757 368 1382 921 248 886 254 228 100 550 809 490 699 766 183 237 963 1455 895 347 603 1078 861 1395 649 1294